Re: Why is git submodule slow under windows

From: Thomas Braun <thomas.braun@virtuell-zuhause.de>
Date: Jul 18, 2014, 12:08 UTC
Message-ID: <53C90E44.6030702@virtuell-zuhause.de>
In-Reply-To: <18956e25b6c14091a64af5a65ce5d13c@FE-MBX1009.de.bosch.com>

Am 18.07.2014 12:14, schrieb Armbruster Joachim (BEG/EMS1):

Show 12 quoted lines

> Hello,
> 
> We split a monolithic repository into ~50 submodules. The stored data
> has the same size. In the 1:1 comparison to the monolithic
> repository, the submodule handling is very slow. Under Linux
> everything remains fast, but windows is slow.
> 
> So, why is git getting slow when it has to deal with a lot of
> submodules? I read something about the lack of the underlying cygwin
> to handle NTFS in a efficient way. Is this the root cause, or are
> there other causes also?
>

Hi,

I assume you are using the latetst git from https://msysgit.github.io on windows.

I would guess that submodules on windows are slow because git-submodules.sh is a shell script, and bash on windows is not really that fast.

There has been some (albeit older) discussion on the msysgit mailinglist, see [1].

You can play around with core.fscache [2] maybe that helps.

Thomas

[1]: https://groups.google.com/d/msg/msysgit/AuPA4EbwchU/N42tsb6GousJ [2]: https://github.com/msysgit/msysgit/releases/tag/Git-1.8.5.2-preview20131230